Power-transmitting device



June 1925. 1,540,014

0. E. JORGENSEN POWER TRANSMITTING DEVICE' Filed June 1'7, 1920 wve wtozPatented June 2, 1925.

UNITED STATES OLAV ESKIL JRG-ENSEN, OF NEW YORK, N. Y.

POWER-TRANSMITTING. DEVICE.

Application filed June 17, 1920. Serial No. 389,575.

To all whom it may concern.

Be it known that I, OLAV EsKIL JoReEN- same subject of the King ofDenmark, residing at New York city, county of New York, and State of NewYork, have invented certain newand u'seful Imp-roveinents' inPower-Transmitting Devices, fully described and represented in thefollowing specification and the accompanying draw ings, forming a partof the same.

This invention relates to power transmitting devices, and particularlyto reversing gear for engines. I

In engines such as Diesel engines, for example, of the type in which theengine valves are operated by means of forward and reverse cams, theshift from one set to the other may be accomplished either by shiftingthe cam shaft or the cam rollers. In either case it is desirable to movethe cam rollers away from the cams prior to the shifting operation.

It is the principal object of the present invention to provide a powertransmitting device, particularly adaptable as a reversing gear forengines, having a suflicient force that is easily manipulated, and suchthat the power transmitting movements are not precipitous. but areproperly held in check.

NVith this general object inview, the in- 'vention consists in thecombinations, details 'of construction and arrangement of partswhichwill first be described in connection with the accompanying drawingand then more particularly pointed out.

.1 ii the drawing-- Figure l is a diagrammatic view with parts invertical cross section of a power transmitting device constructed inaccordance with the invention, and V Figure 2 is a sectional Viewsimilar to part of Fig. 1 taken on a different section line.

In carrying out the invention according to the exemplication hereillustrated, power is derived from a source of compressed air -or thelike. or the other of two communicating cylinders containing oil oralike liquid, while the other cylinder is open to exhaust. The force ofthe compressed air moves a piston in one of the cylinders and throughsuitable This force is delivered to one mechanism the pistons movementshifts the cam rollers away from and back to'the cam.

This movement is held in check by throttling the flow of oil from onecylinder to the other.

Referring to the drawing, in a cylinder 3 slides a piston 4 having apiston rod 5 adapted to be connected with the power-receiving mechanismas hereinafter described. The cylinder 3 below the piston, contains apowertransmitting liquid 6, such, for example, as oil. Communicatingwith cylinder 3 is a second cylinder 7 also containing the oil or likeliquid.

Connections are provided for supplying a fluid under pressure toeithercylinder above the liquid and for opening the other cylinder toexhaust. Although capable of various constructions, in that illustratedas an example, a pipe 8 opening into the top of cylinder 3 leads througha 3-way valve 9 to a pipe 10 adapted to connect with a source ofcompressed air or the like. A'pipe 11 leading from the top of cylinder 7to valve 9 connects that cylinder with supply pipe 10.

Also opening into the top of, cylinder 3 is an exhaust pipe 12 leadingto atmosphere or the like. Pipe 12 is opened or closed by a valve 13. Asimilar exhaust pipe 14, having a control valve 15, leads from the topof cylinder 7.

Means is'provided for throttling the flow of liquid from one cylinder tothe other, and for normally preventing flow. This may be accomplished,for example, by two heavily loaded check valves. Although capable ofvarious constructions, in that illustrated, in a passage 16 connectingthe two cylinders, is a check valve 17 permitting flow from cylinder 3to cylinder 7 but preventing opposite flow. The opening of this valve isopposed by aloading spring 18 the force of which is of a nut 19.

In a second passage 20 is a check valve 21 arranged to permit flow fromcylinder 7 to cylinder 3 and to prevent opposite flow.

The opening of this valve is similarly opposed by a spring 22 havinganadjusting nut 23a The invention includes'in its entirety, in connectionwith an engine cam shaft, a

cam roller having'a shiftable support and an operating connectionbetween such support andthe plston rod. This cam-roller 'support and itsoperating connection may vary widely in construction. In theexcinplification here illustrated diagrammatiadjustab'le by means cally,the engine cam shaft has one or more sets of cams 26, one cam of eachset being for forward, the other for reverse. Cooperating with each setof cams a cam roller 27 journaled in a support 28 on the end of a valverod 29. "Pivoted to the valve rod 29 is a shifting link 30, the otherend of which is connected to an eccen-, trio 31 secured to a shaft 35.This shaft is rotated by a gear 36 mounted thereon, which meshes with aswinging segmental gear 3'? pivotal-1y connected to the piston rod 5. 7

Under normal conditions and the engine operating forward all the valvesare closed and the parts remain in a state of rest or balance as shownin Figure 1. lVhen it is desired to reverse the engine, cylinder 3 isopened -to exhaust by valve 13 and valve 9 is operated to connectcylinder 7 with the air supply pipe 10. The force of the compressed aircauses the oil to flow from cylinder '7 to cylinder 3, valve 21 beingforced open against its spring. This movement of the oil raises piston 4and pistonrod 5 and swings segmental gear 37 to rotate gear 36, thusrotating shaft 35 one revolution. By the resulting operation of theseveral eccentrics 31 the links are first pulled to the right, as viewedin Fig. 1, and then returned to initial position. of this movementswings the lower ends of the valve rods away from normal position, thevalve rods being jointed, as at 33. Thus the cam rollers are shiftedaway from their cams. IVhile so shifted the cams are shifted for reverse(by means not shown). During the latter part of the rotation of shaft35, the opposite movement of links 30 returns the lower ends of thevalve rods to normal position for the operation of the valve rods by thenow operative reverse cams. The air-controlling valves are then closedagain to place the parts in a state of balance, with the piston 1 at theupper end of itsinovement in cylinder 3, flow of oil between thecylinders being prevented. It' will be seen from Figure that, in theembodiment illustrated, in the normal position of the parts, there is adirect thrust along the links 30, thus locking the parts in position.Preferably, the shifting movement of the piston-is such that the shaftis given The first part forced open. This movement of the piston, aswill be apparent, rocks shaft 35 in the opposite direction and thuscauses the links 30 to withdraw the valve rods 29 for shifting the cams,and returns the valve rods to normal position for forward operation. Thevalves 9, 15 and 17 are then closed and all the parts are again in theposition shown in Figure 1, being again held in a state of balance.

lVith the apparatus described a powerful and easily manipulated force isprovided for shifting the cam rollers, At the same time the flow of theoil from one cylinder to the other is 'so throttled, by the loaded checkvalves 17 and 21 in the passages 16 and 20, that the power-transmittingmovement is properly held in check and timed as desired.

It is to beunderstood that the apparatus shown isillustrative only andchanges'may be made within a wide range without departing from theinvention.

VVhatI claim is:

1. In a reversing device for engines, .and the like, a cam roller, ashiftable support for said cam roller, a piston, a cylinder in whichsaid piston reciprocates and which contains a liquid below the piston, asecond cylinder communicating with the first cylinder and alsocontaining a liquid, connections for supplying a fluid under pressure toeither cylinder and opening the other cylinder to exhaust, an operatingconnection between the piston rod and said shiftable support, and meansfor normally preventing a "flow of the liquid from one cylinder to theother.

2. In a reversing device for engines, and the like, a cam roller, ashiftable support for said cam roller, a piston, a cylinder in whichsaid piston reciprocates and which contains a liquid below the piston, asecond cylinder communicating with the first cylinder and alsocontaining a liquid, connections for supplying a fluid under pressure toeither cylinder and opening the other cylinder to exhaust, an operatingconnection between the piston rod and (said shiftable support, and

means for throttlingthe flow of the liquid from one cylinder totheother.

3. In a reversing device for engines, and the like, a cam roller, ashiftable support for said cam roller, a piston, a cylinder in whichsaid piston reciprocatesand which contains a liquid below the piston, asecond cylinder communicating with the first cylinder and alsocontaining a liquid, connections for su pplyinga' fluid under pressureto either cylinder and opening the other cylinder to exhaust, an,operating connection between the piston rod and said shiftable support,and oppositely'disposed loaded check valves between said cylinders. r

4:. Ina reversing device for the like, a cam roller, a shiftable supportengines, and I therefor, an eccentricfor shifting said support, a linkbetween said support and said eccentric, having a direct thrust when ina position of rest, thereby to lock the parts, a reverse-acting,fluid-pressure device for rotaking said eccentric, and means wherebysaid device may be held in a state of balance.

5..In a reversing device for engines, and the like, a cam roller, ashittable support therefor, a piston, a cylinder in which said pistonreciprocates and which contains a liquid below the piston, a secondcylinder communicating with the first cylinder and also containing aliquid, a pipe connected 16 with each cylinder for supplying a fluidunder pressure thereto, a pipe connected with each cylinder for openingthe same to exhaust, valves for controlling flow through said pipes,whereby either cylinder may be opened to the pressure fluid and theother cylinder opened to exhaust, a connection between the piston andthe shiftable support for shifting the support away from and back tonormal position upon one stroke of said piston, and means for preventingliquid flow between the cylinders when all of said Valves are closedr tIn testimony whereof, I have hereunto set my hand.

OLAV ESKIL JCRGENSEN.

